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bad_inode: add missing i_op initializers 

commit 3f9ca75516 upstream.

New inode operations were forgotten to be added to bad_inode.  Most of the
time the op is checked for NULL before being called but marking the inode
bad and the check can race (very unlikely).

However in case of ->get_link() only DCACHE_SYMLINK_TYPE is checked before
calling the op, so there's no race and will definitely oops when trying to
follow links on such a beast.

Also remove comments about extinct ops.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
steinar/wifi_calib_4_9_kernel
Miklos Szeredi 2016-12-09 11:57:43 +01:00 committed by Greg Kroah-Hartman
parent afd2a1994e
commit 6195cd1a96
1 changed files with 51 additions and 4 deletions
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55
fs/bad_inode.c
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@ -106,6 +106,50 @@ static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
return -EIO;
}
static const char *bad_inode_get_link(struct dentry *dentry,
struct inode *inode,
struct delayed_call *done)
{
return ERR_PTR(-EIO);
}
static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type)
{
return ERR_PTR(-EIO);
}
static int bad_inode_fiemap(struct inode *inode,
struct fiemap_extent_info *fieinfo, u64 start,
u64 len)
{
return -EIO;
}
static int bad_inode_update_time(struct inode *inode, struct timespec *time,
int flags)
{
return -EIO;
}
static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry,
struct file *file, unsigned int open_flag,
umode_t create_mode, int *opened)
{
return -EIO;
}
static int bad_inode_tmpfile(struct inode *inode, struct dentry *dentry,
umode_t mode)
{
return -EIO;
}
static int bad_inode_set_acl(struct inode *inode, struct posix_acl *acl,
int type)
{
return -EIO;
}
static const struct inode_operations bad_inode_ops =
{
.create = bad_inode_create,
@ -118,14 +162,17 @@ static const struct inode_operations bad_inode_ops =
.mknod = bad_inode_mknod,
.rename = bad_inode_rename2,
.readlink = bad_inode_readlink,
/* follow_link must be no-op, otherwise unmounting this inode
won't work */
/* put_link returns void */
/* truncate returns void */
.permission = bad_inode_permission,
.getattr = bad_inode_getattr,
.setattr = bad_inode_setattr,
.listxattr = bad_inode_listxattr,
.get_link = bad_inode_get_link,
.get_acl = bad_inode_get_acl,
.fiemap = bad_inode_fiemap,
.update_time = bad_inode_update_time,
.atomic_open = bad_inode_atomic_open,
.tmpfile = bad_inode_tmpfile,
.set_acl = bad_inode_set_acl,
};